0 0 votes How many flip flops are needed to build a divide by 12 johnson counter a)12 b)10 c)8 d)6 CO & Architecture + – Sanjay Sharma 6.3k views answer comment Share Follow Print 0 reply Please log in or register to add a comment.
Best answer 7 7 votes A Johnson counter where the inverted output from the last flip flop is connected to the input to the first. The register cycles through a sequence of bit-patterns. The MOD of the Johnson counter is 2n if n flip-flops are used. So 12 cycles need 6 FF only. Prashant. answered Nov 4, 2016 • selected Nov 4, 2016 by vijaycs Prashant. comment Share Follow See all 2 Comments 2 2 Comments reply vijaycs commented Nov 4, 2016 reply Follow flag Why 8 .?? Divide by 12 means mod 12 right?? And Johnson counter requires n ff to generate mod 2n counter . So ans should be 6 . 1 1 replyShare srestha commented Nov 4, 2016 reply Follow flag yes,from 2n states only 2n used state. requires n bit and n FF for it 0 0 replyShare Please log in or register to add a comment.
